October Weather in Porteña Argentina

Daily high temperatures increase by 5°F, from 75°F to 80°F, rarely falling below 65°F or exceeding 90°F.

Daily low temperatures increase by 6°F, from 55°F to 61°F, rarely falling below 46°F or exceeding 69°F.

For reference, on January 8, the hottest day of the year, temperatures in Porteña typically range from 69°F to 88°F, while on July 18, the coldest day of the year, they range from 44°F to 63°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Al Bahah, Saudi Arabia (7,705 miles away) is the far-away foreign place with temperatures most similar to Porteña (view comparison).

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The month of October in Porteña experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 28% throughout the month.

The clearest day of the month is October 30, with clear, mostly clear, or partly cloudy conditions 73% of the time.

For reference, on June 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on March 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Porteña, the chance of a wet day over the course of October is very rapidly increasing, starting the month at 20% and ending it at 32%.

For reference, the year's highest daily chance of a wet day is 41% on December 17, and its lowest chance is 7% on August 8.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during October in Porteña is rapidly increasing, starting the month at 2.3 inches, when it rarely exceeds 4.1 inches or falls below 0.9 inches, and ending the month at 3.9 inches, when it rarely exceeds 6.4 inches or falls below 1.7 inches.

Over the course of October in Porteña, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 54 minutes, implying an average daily increase of 1 minute, 49 seconds, and weekly increase of 12 minutes, 42 seconds.

The shortest day of the month is October 1, with 12 hours, 25 minutes of daylight and the longest day is October 31, with 13 hours, 19 minutes of daylight.

The latest sunrise of the month in Porteña is 6:45 AM on October 1 and the earliest sunrise is 33 minutes earlier at 6:12 AM on October 31.

The earliest sunset is 7:10 PM on October 1 and the latest sunset is 21 minutes later at 7:31 PM on October 31.

Daylight saving time is not observed in Porteña during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:01 AM and sets 14 hours, 10 minutes later, at 8:11 PM, while on June 20, the shortest day of the year, it rises at 8:06 AM and sets 10 hours, 8 minutes later, at 6:14 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for October 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Porteña is increasing during October, rising from 6% to 16% over the course of the month.

For reference, on February 7, the muggiest day of the year, there are muggy conditions 60% of the time, while on July 18, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Porteña is essentially constant during October, remaining within 0.1 miles per hour of 10.5 miles per hour throughout.

For reference, on September 18, the windiest day of the year, the daily average wind speed is 10.7 miles per hour, while on May 5, the calmest day of the year, the daily average wind speed is 8.4 miles per hour.

The hourly average wind direction in Porteña throughout October is predominantly from the east, with a peak proportion of 47% on October 10.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Porteña typically lasts for 11 months (322 days), from around August 5 to around June 23, rarely starting after September 5, or ending before May 30.

The month of October in Porteña is reliably fully within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Porteña are rapidly increasing during October, increasing by 525°F, from 811°F to 1,336°F, over the course of the month.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Porteña is increasing during October, rising by 1.1 kWh, from 5.9 kWh to 7.0 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Porteña are -31.014 deg latitude, -62.067 deg longitude, and 344 ft elevation.

The topography within 2 miles of Porteña is essentially flat, with a maximum elevation change of 85 feet and an average elevation above sea level of 339 feet. Within 10 miles is essentially flat (98 feet). Within 50 miles also contains only modest variations in elevation (272 feet).

The area within 2 miles of Porteña is covered by cropland (95%), within 10 miles by cropland (92%), and within 50 miles by cropland (61%) and water (20%).